I have no problem with a fan not wanting him at their club, although IMO there was a fair bit of grandstanding involved at the time when there didnt need to be.
I do have a problem with those, usually public figures, that objected to the principal of him working in football fullstop.
Certain professions have restrictions on convicted felons gaining employment, but league footballer is not one of them. If it was I wouldnt have a problem at all.
I'd be asking some of these what they have done since to change the rules to ensure everyone is treated the same, and peoples ability to rehabilitate and resume a career is based on the legal system, not who has the lobby group prepared to shout the loudest.
Surely if it was important back then when there was publicity in it, it's still important now.